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https://www.readbyqxmd.com/read/28548656/nlr-locus-mediated-trade-off-between-abiotic-and-biotic-stress-adaptation-in-arabidopsis
#1
Hirotaka Ariga, Taku Katori, Takashi Tsuchimatsu, Taishi Hirase, Yuri Tajima, Jane E Parker, Rubén Alcázar, Maarten Koornneef, Owen Hoekenga, Alexander E Lipka, Michael A Gore, Hitoshi Sakakibara, Mikiko Kojima, Yuriko Kobayashi, Satoshi Iuchi, Masatomo Kobayashi, Kazuo Shinozaki, Yoichi Sakata, Takahisa Hayashi, Yusuke Saijo, Teruaki Taji
Osmotic stress caused by drought, salt or cold decreases plant fitness. Acquired stress tolerance defines the ability of plants to withstand stress following an initial exposure(1). We found previously that acquired osmotolerance after salt stress is widespread among Arabidopsis thaliana accessions(2). Here, we identify ACQOS as the locus responsible for ACQUIRED OSMOTOLERANCE. Of its five haplotypes, only plants carrying group 1 ACQOS are impaired in acquired osmotolerance. ACQOS is identical to VICTR, encoding a nucleotide-binding leucine-rich repeat (NLR) protein(3)...
May 26, 2017: Nature Plants
https://www.readbyqxmd.com/read/28546489/genome-sequence-of-a-marine-spirillum-oceanospirillum-multiglobuliferum-atcc-33336-t-isolated-from-japan
#2
Joshua G Carney, Ariel M Trachtenberg, Bruce A Rheaume, Joshua D Linnane, Natalie L Pitts, Donald L Mykles, Kyle S MacLea
Oceanospirillum multiglobuliferum ATCC 33336(T) is a motile gammaproteobacterium with bipolar tufted flagella, noted for its low salt tolerance compared to other marine spirilla. This strain was originally isolated from the putrid infusions of Crassostrea gigas near Hiroshima, Japan. This paper presents a draft genome sequence for O. multiglobuliferum ATCC 33336(T).
May 25, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28542282/expression-patterns-of-members-of-the-ethylene-signaling-related-gene-families-in-response-to-dehydration-stresses-in-cassava
#3
Meng Yun Ren, Ren Jun Feng, Hou Rui Shi, Li Fang Lu, Tian Yan Yun, Ming Peng, Xiao Guan, Heng Zhang, Jing Yi Wang, Xi Yan Zhang, Cheng Liang Li, Yan Jun Chen, Peng He, Yin Dong Zhang, Jiang Hui Xie
Drought is the one of the most important environment stresses that restricts crop yield worldwide. Cassava (Manihot esculenta Crantz) is an important food and energy crop that has many desirable traits such as drought, heat and low nutrients tolerance. However, the mechanisms underlying drought tolerance in cassava are unclear. Ethylene signaling pathway, from the upstream receptors to the downstream transcription factors, plays important roles in environmental stress responses during plant growth and development...
2017: PloS One
https://www.readbyqxmd.com/read/28542267/discerning-morpho-anatomical-physiological-and-molecular-multiformity-in-cultivated-and-wild-genotypes-of-lentil-with-reconciliation-to-salinity-stress
#4
Dharmendra Singh, Chandan Kumar Singh, Shanti Kumari, Ram Sewak Singh Tomar, Sourabh Karwa, Rajendra Singh, Raja Bahadur Singh, Susheel Kumar Sarkar, Madan Pal
One hundred and sixty two genotypes of different Lens species were screened for salinity tolerance in hydroponics at 40, 80 and 120 mM sodium chloride (NaCl) for 30 d. The germination, seedling growth, biomass accumulation, seedling survivability, salinity scores, root and shoot anatomy, sodium ion (Na+), chloride ion (Cl-) and potassium ion (K+) concentrations, proline and antioxidant activities were measured to evaluate the performance of all the genotypes. The results were compared in respect of physiological (Na+, K+ and Cl-) and seed yield components obtained from field trials for salinity stress conducted during two years...
2017: PloS One
https://www.readbyqxmd.com/read/28541352/copper-i-mediated-carboamination-of-vinyl-azides-by-aryldiazonium-salts-synthesis-of-n-2-substituted-1-2-3-triazoles
#5
Zhenhua Liu, Huimin Ji, Wen Gao, Guangyu Zhu, Lili Tong, Fengcai Lei, Bo Tang
A copper(i)-mediated carboamination cascade reaction between vinyl azides and aryldiazonium salts is described. Functionally diverse N(2)-substituted 1,2,3-triazoles were obtained in moderate to good yields through novel difunctionalization of vinyl azides by aryldiazonium salt sources. This method has a wide scope, good functional-group tolerance and insensitivity to an ambient atmosphere.
May 25, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28536792/cotton-gherf38-gene-is-involved-in-plant-response-to-salt-drought-and-aba
#6
Liufeng Ma, Longxing Hu, Jibiao Fan, Erick Amombo, A B M Khaldun, Yong Zheng, Liang Chen
ERF (ethylene-responsive factor) transcription factors play important roles in plant stress signaling transduction pathways. However, their specific roles during diverse abiotic stresses tolerance in Gossypium hirsutum are largely unknown. Here, a novel ERF transcription factor, designated GhERF38, homologous to AtERF38 in Arabidopsis, was isolated from cotton (Gossypium hirsutum L). GhERF38 expression was up-regulated by salt, drought and ABA treatments. Subcellular localization results indicated that GhERF38 was localized in the cell nucleus...
May 23, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28536672/response-to-bile-salts-in-clinical-strains-of-acinetobacter-baumannii-lacking-the-adeabc-efflux-pump-virulence-associated-with-quorum-sensing
#7
Maria López, Lucia Blasco, Eva Gato, Astrid Perez, Laura Fernández-Garcia, Luis Martínez-Martinez, Felipe Fernández-Cuenca, Jesús Rodríguez-Baño, Alvaro Pascual, German Bou, Maria Tomás
Introduction:Acinetobacter baumannii is an opportunistic nosocomial pathogen associated with multiple infections. This pathogen usually colonizes (first stage of microbial infection) host tissues that are in contact with the external environment. As one of the sites of entry in human hosts is the gastrointestinal tract, the pathogen must be capable of tolerating bile salts. However, studies analyzing the molecular characteristics involved in the response to bile salts in clinical strains of A. baumannii are scarce...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28536593/molecular-characterization-and-expression-profiling-of-brachypodium-distachyon-l-cystatin-genes-reveal-high-evolutionary-conservation-and-functional-divergence-in-response-to-abiotic-stress
#8
Saminathan Subburaj, Dong Zhu, Xiaohui Li, Yingkao Hu, Yueming Yan
Cystatin is a class of proteins mainly involved in cysteine protease inhibition and plant growth and development, as well as tolerance under various abiotic stresses. In this study, we performed the first comprehensive analysis of the molecular characterization and expression profiling in response to various abiotic stresses of the cystatin gene family in Brachypodium distachyon, a novel model plant for Triticum species with huge genomes. Comprehensive searches of the Brachypodium genome database identified 25 B...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28536588/a-novel-wheat-c-bzip-gene-tabzip14-b-participates-in-salt-and-freezing-tolerance-in-transgenic-plants
#9
Lina Zhang, Lichao Zhang, Chuan Xia, Lifeng Gao, Chenyang Hao, Guangyao Zhao, Jizeng Jia, Xiuying Kong
The group C-bZIP transcription factors (TFs) are involved in diverse biological processes, such as the regulation of seed storage protein (SSP) production and the responses to pathogen challenge and abiotic stress. However, our knowledge of the abiotic functions of group C-bZIP genes in wheat remains limited. Here, we present the function of a novel TabZIP14-B gene in wheat. This gene belongs to the group C-bZIP TFs and contains six exons and five introns; three haplotypes were identified among accessions of tetraploid and hexaploid wheat...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28535592/stream-salinization-and-fungal-mediated-leaf-decomposition-a-microcosm-study
#10
Cristina Canhoto, Sara Simões, Ana Lúcia Gonçalves, Lúcia Guilhermino, Felix Bärlocher
Salinization is of major global concern due to its effect on stream biota, and ecosystem functions and services. In small streams, litter decomposition is a key ecosystem-level process driven by decomposers, mainly fungi (aquatic hyphomycetes), which link litter and invertebrates. Here we assessed the effects of an environmentally relevant range of salt additions (0, 2, 4, 8, 16gL(-1) NaCl) on (1) fungal growth and species-specific reproductive output and (2) fungal mediated-decomposition of Quercus robur leaves...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28533787/genome-wide-analysis-of-gene-expression-provides-new-insights-into-cold-responses-in-thellungiella-salsuginea
#11
Jiangshan Wang, Quan Zhang, Feng Cui, Lei Hou, Shuzhen Zhao, Han Xia, Jingjing Qiu, Tingting Li, Ye Zhang, Xingjun Wang, Chuanzhi Zhao
Low temperature is one of the major environmental stresses that affects plant growth and development, and leads to decrease in crop yield and quality. Thellungiella salsuginea (salt cress) exhibits high tolerance to chilling, is an appropriate model to investigate the molecular mechanisms of cold tolerance. Here, we compared transcription changes in the roots and leaves of T. salsuginea under cold stress using RNA-seq. We identified 2,782 and 1,430 differentially expressed genes (DEGs) in leaves and roots upon cold treatment, respectively...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28529668/diastereoselective-radical-type-cyclopropanation-of-electron-deficient-alkenes-mediated-by-the-highly-active-cobalt-ii-tetramethyltetraaza-14-annulene-catalyst
#12
Andrei Chirila, Braja Gopal Das, Nanda D Paul, Bas de Bruin
A new protocol for the catalytic synthesis of cyclopropanes using electron-deficient alkenes is presented, which is catalysed by a series of affordable, easy to synthesise and highly active substituted cobalt(II) tetraaza[14]annulenes. These catalysts are compatible with the use of sodium tosylhydrazone salts as precursors to diazo compounds in one-pot catalytic transformations to afford the desired cyclopropanes in almost quantitative yields. The reaction takes advantage of the metalloradical character of the Co complexes to activate the diazo compounds...
April 21, 2017: ChemCatChem
https://www.readbyqxmd.com/read/28528384/effects-of-salts-contained-in-lignocellulose-derived-sugar-streams-on-microbial-lipid-production
#13
Zhu Chen, Caixia Wan
This study aimed at developing low-cost, robust non-sterile fermentation processes for microbial lipid production from lignocellulose-derived sugars. Three representative oleaginous yeasts, Lipomyces tetrasporus (NRRL Y-11562), Rhodotorula toruloides (NRRL Y-1091), and Yarrowia lipolytica (NRRL YB-437), were tested for lipid production via non-sterile fermentation. Under optimal non-sterile conditions, all the tested strains had good performance on salt tolerance and lipid production. L. tetrasporus (NRRL Y-11562) gave the highest lipid titer of 12...
May 20, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28527975/the-reaumuria-trigyna-transcription-factor-rtwrky1-confers-tolerance-to-salt-stress-in-transgenic-arabidopsis
#14
Chao Du, Pingping Zhao, Huirong Zhang, Ningning Li, Linlin Zheng, Yingchun Wang
Reaumuria trigyna (R. trigyna) is an endangered small shrub endemic to the Eastern Alxa-Western Ordos area in Inner Mongolia, China. Based on R. trigyna transcriptome data, the Group I WRKY transcription factor gene RtWRKY1 was cloned from R. trigyna. The full-length RtWRKY1 gene was 2100bp, including a 1261-bp open reading frame (ORF) encoding 573 amino acids. RtWRKY1 was mainly expressed in the stem and was induced by salt, cold stress, and ABA treatment. Overexpression of RtWRKY1 in Arabidopsis significantly enhanced the chlorophyll content, root length, and fresh weight of the transgenic lines under salt stress...
May 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28527016/chemical-derivatization-of-metabolite-mass-profiling-of-the-recretohalophyte-aeluropus-lagopoides-revealing-salt-stress-tolerance-mechanism
#15
Murali Krishna Paidi, Parinita Agarwal, Prashant More, Pradeep K Agarwal
Plants are the primary producers of food for human being. Their intracellular environment alternation is influenced by abiotic stress factors such as drought, heat and soil salinity. Aeluropus lagopoides is a strong halophyte that grows with ease under high saline muddy banks of creeks of Gujarat, India. To study the response of salinity on metabolite changes in Aeluropus, three treatments, i.e. control, salinity and recovery, were selected for both shoot and root tissue. The cytosolic metabolite state was analysed by molecular chemical derivatization gas chromatography mass profiling...
May 19, 2017: Marine Biotechnology
https://www.readbyqxmd.com/read/28523010/beneficial-soil-bacterium-pseudomonas-frederiksbergensis-os261-augments-salt-tolerance-and-promotes-red-pepper-plant-growth
#16
Poulami Chatterjee, Sandipan Samaddar, Rangasamy Anandham, Yeongyeong Kang, Kiyoon Kim, Gopal Selvakumar, Tongmin Sa
Soil salinity, being a part of natural ecosystems, is an increasing problem in agricultural soils throughout the world. Pseudomonas frederiksbergensis OS261 has already been proved to be an effective bio-inoculant for enhancing cold stress tolerance in plants, however, its effect on salt stress tolerance is unknown. The main aim of the present study was to elucidate P. frederiksbergensis OS261 mediated salt stress tolerance in red pepper. The plants were exposed to a salt stress using NaCl at the concentrations of 50, 100, and 150 mM after 12 days of transplantation, while plant growth and enzyme activity were estimated 50 days after sowing...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28520766/transcriptomic-analysis-of-salt-stress-responsive-genes-in-rhazya-stricta
#17
Nahid H Hajrah, Abdullah Y Obaid, Ahmed Atef, Ahmed M Ramadan, Dhivya Arasappan, Charllotte A Nelson, Sherif Edris, Mohammed Z Mutwakil, Alawia Alhebshi, Nour O Gadalla, Rania M Makki, Madgy A Al-Kordy, Fotouh M El-Domyati, Jamal S M Sabir, Mohammad A Khiyami, Neil Hall, Ahmed Bahieldin, Robert K Jansen
Rhazya stricta is an evergreen shrub that is widely distributed across Western and South Asia, and like many other members of the Apocynaceae produces monoterpene indole alkaloids that have anti-cancer properties. This species is adapted to very harsh desert conditions making it an excellent system for studying tolerance to high temperatures and salinity. RNA-Seq analysis was performed on R. stricta exposed to severe salt stress (500 mM NaCl) across four time intervals (0, 2, 12 and 24 h) to examine mechanisms of salt tolerance...
2017: PloS One
https://www.readbyqxmd.com/read/28516766/in-situ-generated-tempo-oxoammonium-salt-mediated-tandem-cyclization-of-%C3%AE-oxoamides-with-amine-hydrochlorides-for-the-synthesis-of-pyrrolin-4-ones
#18
Xuna Zhao, Tong-Xin Liu, Nana Ma, Guisheng Zhang
A novel in situ generated TEMPO oxoammonium salt mediated one-pot tandem reaction has been developed for the straightforward construction of pyrrolin-4-ones from readily available β-oxoamides with amine hydrochlorides. The reaction tolerates various functional groups and represents a reliable method for the synthesis of highly substituted pyrrolin-4-ones in good yields under mild conditions. Detailed mechanistic studies disclosed that TEMPO oxoammonium salt generated in situ was crucial for the transformation involving the formation of enaminone precursors in situ by condensation of the β-oxoamides with amines, followed by sequential oxidative coupling with β-oxoamides, intramolecular cyclization, and 1,2-alkyl migration steps...
May 24, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28512784/evaluation-of-aromatic-radiobromination-by-nucleophilic-substitution-using-diaryliodonium-salt-precursors
#19
Dong Zhou, Sung Hoon Kim, Wenhua Chu, Thomas Voller, John A Katzenellenbogen
Radiobromine labelled compounds can be used for positron emission tomography (PET) imaging (i.e. (76) Br) and for radiation therapy (i.e. (77) Br). However, the commonly used electrophilic substitution reaction using no-carrier-added (NCA) radiobromide does not always afford the desired product due to the high reactivity of the brominating intermediate. A nucleophilic substitution by bromide, such as radiobromination of iodonium precursors, provides an alternative route for the synthesis of bromo-radiopharmaceuticals...
May 17, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28510204/microarray-meta-analysis-to-explore-abiotic-stress-specific-gene-expression-patterns-in-arabidopsis
#20
Po-Chih Shen, Ai-Ling Hour, Li-Yu Daisy Liu
BACKGROUND: Abiotic stresses are the major limiting factors that affect plant growth, development, yield and final quality. Deciphering the underlying mechanisms of plants' adaptations to stresses using few datasets might overlook the different aspects of stress tolerance in plants, which might be simultaneously and consequently operated in the system. Fortunately, the accumulated microarray expression data offer an opportunity to infer abiotic stress-specific gene expression patterns through meta-analysis...
December 2017: Botanical Studies (Taipei, Taiwan)
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